Re: 6.5.4 upgrades - do or die tomorrow -- DOMINO400

Sean, thanks. I had already setup TCP routes as you mentioned. That should 
just be a best practice. My close-wait timeout is at 120. We are at the 
latest PTF levels on all our products, so I should have those PTFs if they 
are production. Do you mind if I forward your findings to my IBM Support 
rep? Do you have an associated PMR? You can send me that acknowledgement 
and PMR offline if you wish.

Chris Whisonant
Comporium
Senior Mid-Range Systems Administrator
IBM eServer Certified Systems Expert - iSeries Technical Solutions V5R2
IBM Certified System Administrator - Lotus Notes and Domino 6/6.5
803.326.7270 | 803.326.6142 fax
http://cwhisonant.blogspot.com/

domino400-bounces+chris.whisonant=comporium.com@xxxxxxxxxxxx wrote on 
07/12/2005 01:18:59 PM:

> Chris, 
> 
> I am running 6.5.4 now on all servers with NO Notes Client issues. 
> 
> Ask for Doreen Ward at IBM iSeries/400 Advanced Support
> 
> Based our consulting engagement with IBM and AT&T, and allot of testing 
on 
> my part in conjunction with our Networking team etc, 
> we changed a few settings and applied a custom PTF which fixed latency 
on 
> slow connections. 
> 
> 1) We created static routes for our NIC Cards, so the traffic returns to 

> the NIC it came from. 
> 
> (I edited the IPs  for security reasons)
> 
>                            Work with TCP/IP Routes 
>                                                             System: 
> XXXXXXXXXX
> Type options, press Enter. 
>   1=Add   2=Change   4=Remove   5=Display 
> 
>      Route            Subnet           Next             Preferred 
> Opt  Destination      Mask             Hop              Interface 
> 
>      *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X    192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X    192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
>      *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
> 
> 
>     2) We changed the    TCP closed timewait timeout  . .   to 0. 
> 
>  Default is default 2 minutes and connections would stay open waiting 
for 
> a final ACK ,that sometimes never came.
> 
> This solved allot of the hung connection issues we were having! 
> 
>  TCP R1 retransmission count  . .   3 
>  TCP R2 retransmission count  . .   16 
>  TCP minimum retransmit time  . .   750 
>  TCP closed timewait timeout  . .   0 
>  TCP close connection message . .   *THRESHOLD 
>  UDP checksum . . . . . . . . . .   *YES 
>  Path MTU discovery: 
> 
> 
> 3)We also applied a PTF for TCP/IP Slow start which should be in the 
> cumulative by now.
> 
> 4) We also Changed the TCP minimum retransmit time  . .   750     since 
we 
> were having allot of retransmissions over slow links. 
> 
> What PTF Levels are you on?
> 
> Sean 
> 
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